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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME - UNAUDITED - USD ($) $ in Thousands | Total | Redeemable Noncontrolling Interests [Member] | Common Stock [Member] | Common Stock [Member] Class A Common Stock [Member] | Capital In Excess Of Par Value [Member] | Deferred Compensation Obligation [Member] | HEICO Stock Held By Irrevocable Trust [Member] | AOCI Attributable to Parent [Member] | Retained Earnings [Member] | Noncontrolling Interest [Member] | Total Shareholders Equity [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Starting Balance at Oct. 31, 2015 |  |  | $ 269 | $ 400 | $ 286,220 | $ 1,783 | $ (1,783) | $ (25,080) | $ 548,054 | $ 83,408 | $ 893,271
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Parent | $ 75,922 |  |  |  |  |  |  | 5,994 | 69,928 |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest | 10,279 | $ 5,221 |  |  |  |  |  |  |  | 5,058 |
Comprehensive income | 86,201 |  |  |  |  |  |  |  |  |  | 80,980
Cash dividends |  |  |  |  |  |  |  |  | (5,350) |  | (5,350)
Issuance of common stock to Savings and Investment Plan |  |  | 1 | 1 | 4,846 |  |  |  |  |  | 4,848
Share-based compensation expense |  |  |  |  | 3,286 |  |  |  |  |  | 3,286
Proceeds from stock option exercises |  |  |  |  | 1,471 |  |  |  |  |  | 1,471
Tax benefit from stock option exercises |  |  |  |  | 870 |  |  |  |  |  | 870
Distributions to noncontrolling interests |  | (4,086) |  |  |  |  |  |  |  | (1,421) | (1,421)
Acquisition of noncontrolling interests |  | (3,599) |  |  |  |  |  |  |  |  |
Adjustments to redemption amount of redeemable noncontrolling interests |  | (438) |  |  |  |  |  |  | 438 |  | 438
Deferred compensation obligation |  |  |  |  |  | (148) |  |  |  |  |
Stock Issued During Period Value Deferred Compensation Obligation |  |  |  |  |  |  | 148 |  |  |  |
Other |  |  |  |  |  |  |  |  | (2) |  | (48)
Adjustments to Additional Paid in Capital, Other |  |  |  |  | (4) |  |  |  |  | 50 |
Ending Balance at Apr. 30, 2016 |  |  | 270 | 401 | 296,689 | 1,635 | (1,635) | (19,086) | 613,072 | 87,095 | 978,441
Starting Balance, Redeemable Noncontrolling Interests at Oct. 31, 2015 |  | 91,282 |  |  |  |  |  |  |  |  |
Ending Balance, Redeemable Noncontrolling Interests at Apr. 30, 2016 |  | 88,380 |  |  |  |  |  |  |  |  |
Starting Balance at Oct. 31, 2016 | 1,047,705 |  | 270 | 403 | 306,328 | 2,460 | (2,460) | (25,326) | 681,704 | 84,326 | 1,047,705
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Parent | 86,937 |  |  |  |  |  |  | 324 | 86,613 |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest | 10,410 | 5,151 |  |  |  |  |  |  |  | 5,259 |
Comprehensive income | 97,347 |  |  |  |  |  |  |  |  |  | 92,196
Cash dividends |  |  |  |  |  |  |  |  | (6,059) |  | (6,059)
Stock Issued During Period, Value, Stock Dividend |  |  | 68 | 101 |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Stock Split |  |  |  |  | (169) |  |  |  |  |  |
Dividends, Common Stock, Stock |  |  |  |  |  |  |  |  | (23) |  | (23)
Issuance of common stock to Savings and Investment Plan |  |  |  |  | 5,484 |  |  |  |  |  | 5,484
Share-based compensation expense |  |  |  |  | 3,110 |  |  |  |  |  | 3,110
Proceeds from stock option exercises |  |  |  | 1 | 2,296 |  |  |  |  |  | 2,297
Distributions to noncontrolling interests |  | (3,544) |  |  |  |  |  |  |  | (353) | (353)
Acquisition of noncontrolling interests |  | (3,848) |  |  |  |  |  |  |  |  |
Adjustments to redemption amount of redeemable noncontrolling interests |  | 5,826 |  |  |  |  |  |  | (5,826) |  | (5,826)
Deferred compensation obligation |  |  |  |  |  | (140) |  |  |  |  |
Stock Issued During Period Value Deferred Compensation Obligation |  |  |  |  |  |  | 140 |  |  |  |
Other |  |  |  | (1) |  |  |  |  | (1) |  |
Ending Balance at Apr. 30, 2017 | 1,138,531 |  | $ 338 | $ 506 | $ 317,049 | $ 2,320 | $ (2,320) | $ (25,002) | $ 756,408 | $ 89,232 | $ 1,138,531
Starting Balance, Redeemable Noncontrolling Interests at Oct. 31, 2016 | 99,512 | 99,512 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Increase from Business Combination |  | 22,035 |  |  |  |  |  |  |  |  |
Ending Balance, Redeemable Noncontrolling Interests at Apr. 30, 2017 | $ 125,132 | $ 125,132 |  |  |  |  |  |  |  |  |

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